Complexation-flocculation combined with microwave-assisted headspace solid-phase microextraction in determining the binding constants of hydrophobic organic pollutants to dissolved humic substances

The binding constants, K DOC , of selected polycyclic aromatic hydrocarbons (PAHs)-phenanthrene, anthracene, fluoranthene, and pyrene-to dissolved humic substances (DHS) were determined by complexation-flocculation combined with microwave-assisted headspace solid-phase microextraction (CF-MA-HS-SPME...

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Published in:Analyst (London) 2015-02, Vol.14 (4), p.1275-128
Main Authors: Hsieh, Ping-Chieh, Lee, Chon-Lin, Jen, Jen-Fon, Chang, Kuei-Chen
Format: Article
Language:English
Subjects:
Binding Sites
Environmental Monitoring - instrumentation
Equipment Design
Flocculation
Gas Chromatography-Mass Spectrometry
Humic Substances - analysis
Hydrophobic and Hydrophilic Interactions
Microwaves
Polycyclic Aromatic Hydrocarbons - analysis
Polycyclic Aromatic Hydrocarbons - isolation & purification
Solid Phase Microextraction - instrumentation
Water Pollutants, Chemical - analysis
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Summary:The binding constants, K DOC , of selected polycyclic aromatic hydrocarbons (PAHs)-phenanthrene, anthracene, fluoranthene, and pyrene-to dissolved humic substances (DHS) were determined by complexation-flocculation combined with microwave-assisted headspace solid-phase microextraction (CF-MA-HS-SPME). The results obtained are comparable with K DOC data reported in the literature. No disruption of the PAH to DHS binding equilibrium was observed during the complexation-flocculation process. The present study, which is the first to determine K DOC by CF-MA-HS-SPME, provides an alternative approach to determine the K DOC of PAHs. CF-MA-HS-SPME provides some advantages over other methods, such as no limitation of fluorescent compounds, greater determination speed, and the capability of measuring various compounds simultaneously. CF-MA-HS-SPME is broadly applicable, with advantages over traditional methods for determining the K DOC of hydrophobic organic pollutants to dissolved humic substances.
ISSN:0003-2654
1364-5528
DOI:10.1039/c4an01923g